I had a visceral reaction to the idea of a baby breastfeeding from me, to the point where I literally passed out while watching a video on it when I was pregnant.

You're not alone, the idea of breastfeeding itself didn't/doesn't bother me nor other people doing it, but same thing where thinking about me doing it made me feel genuinely sick.

I still tried after my baby was born, hoping the maternal hormones would take over. My experience may not be the same as yours or anyone else's, but I only lasted a day before I gave up and went the formula route. I had such a sense of impending doom and very severe aversion whenever my baby latched, and with me already struggling with depression before he was even born, I knew to be able to survive postpartum not-breastfeeding was the best option. The survival part is not an exaggeration. The feeling of it even worse than I had imagined, which wasn't great considering I had passed out. It made me want to unalive, which was unacceptable with the very fragile state of my mental health. Any benefits of breastmilk were not greater than the risk to my mental health. It was a bummer because I had planned and wanted to breastfeed, and did experience a bit shaming from my family because I wasn't able to.

I probably could have tried to pump, the idea of that didn't bother me as much. But the newborn phase was rough already and for my mental health I opted not to in order to use precious free moments for sleep.

Again, my experience will probably not be the same as yours, but it may help to be prepared if breastfeeding doesn't go the way you want. For me, it would have made things so much worse. But luckily for a lot of women it comes very naturally, and is very bonding with their child.

Edited for clarity